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Installation method of stand pipe protection frame

An installation method and protection frame technology, which are applied in the directions of pipeline laying and maintenance, pipes/pipe joints/pipe fittings, machinery and equipment, etc., can solve the problems of high cost, high construction difficulty and high risk, so as to save costs and resources and reduce operations. Risks and the effect of improving construction efficiency

Inactive Publication Date: 2020-09-25
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This installation method: 1. It needs to invest in floating crane resources, and the cost is relatively high; 2. It needs to go through the reverse buckle process from floating crane hoisting to chain and winch hoisting, which is risky and difficult to construct

Method used

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  • Installation method of stand pipe protection frame

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0023] Examples, see figure 1 As shown, a method for installing a riser protection frame is realized through the following steps.

[0024] S1: Install a towing system on the bottom deck 12 of the platform for dragging the riser protection frame 5 to a predetermined position near the riser 11, and install a dragging system at a predetermined position on the sea surface to prevent the riser protection frame 5 from colliding with the The protection system of the standpipe 11 is provided above the installation position of the standpipe protection frame 5 with a chain-reversing system for inserting the standpipe protection frame 5 into the periphery of the standpipe 11 .

[0025] S2: ...

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Abstract

The invention discloses an installation method of a stand pipe protection frame. The installation method includes the following 4 steps that S1 a drag system, a protection system and a reverse chain system are established; S2 a suitable air bag is bound to the stand pipe protection frame, and ropes extending from each system are fixed to the stand pipe protection frame; S3 the drag system drags the stand pipe protection frame to a designated position, and the stand pipe protection frame is installed on the periphery of a stand pipe by the reverse chain system; and S4 the stand pipe is fixed, and the ropes are dismantled. In the installation of the stand pipe protection frame, no floating crane resources are used, and tugs for transporting the stand pipe protection frame are not needed to be close to the stand pipe for operation, the installation operation of the stand pipe protection frame can be completed conveniently and quickly, the project cost is saved, the operation risk is reduced, and the construction efficiency is improved.

Description

technical field [0001] The invention relates to the field of maintenance and transformation of ocean engineering platforms, in particular to a method for installing a riser protection frame. Background technique [0002] The marine riser is the pipeline connecting the seabed and the floating body on the sea surface, and its main function is to transport oil or natural gas. The main categories are free standing risers, steel catenary risers, flexible risers, etc. [0003] While the offshore platform riser bears high internal working pressure, its external environment is also relatively harsh. It will not only be affected by environmental loads such as waves, currents, and sea ice, but also be damaged by ship collisions. Once the riser is damaged by collision, the crude oil or natural gas it transports may leak, which will also lead to major accidents such as damage to offshore platform production facilities and personal injury, which will bring huge losses to the environment...

Claims

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Application Information

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IPC IPC(8): F16L1/15F16L1/20
CPCF16L1/15F16L1/202F16L1/205
Inventor 刘建峰王彦多孙道青杜颖赵刚沈健黄海龙张琛张健
Owner CHINA NAT OFFSHORE OIL CORP
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